Solar and Energy Upgrade Finance Australia (2026)
Solar panels, battery storage, heat pump hot water systems, and energy-efficient upgrades can be financed through a range of options — from specialist green loans to home equity and standard personal loans. Government incentives may reduce the upfront cost significantly.
Typical Energy Upgrade Costs in Australia
| Upgrade type | Typical installed cost |
|---|---|
| Solar panel system (6.6kW, most common residential) | $5,500–$9,000 |
| Solar panel system (10kW) | $8,000–$14,000 |
| Battery storage (10–13kWh, e.g., Tesla Powerwall) | $12,000–$18,000 |
| Solar + battery bundle | $18,000–$30,000 |
| Heat pump hot water system | $2,000–$5,000 |
| Ducted reverse-cycle air conditioning | $8,000–$20,000 |
| Double-glazed windows | $10,000–$40,000 (whole house) |
| Insulation (ceiling + walls) | $2,000–$8,000 |
Government Incentives — Reduce the Net Cost
Federal — Small-scale Technology Certificates (STCs): Solar systems under 100kW and solar hot water systems are eligible for STCs through the federal government’s Renewable Energy Target scheme. Most installers apply the STC discount at the point of sale — reducing the upfront cost by $1,500–$4,000 depending on system size and location.
State and territory incentives: State programs vary and change frequently. Examples:
| State | Program (examples — confirm current status) | Benefit |
|---|---|---|
| Victoria | Solar Homes Program | Rebates and interest-free loans for eligible households |
| NSW | Sustainable Home and Climate Saver rebates | Rebates for eligible upgrades |
| QLD | Various council and state programs | Varies |
| SA | Home Battery Scheme (check current status) | Battery rebates |
| WA | Synergy Solar Home Program | Varies |
State programs change regularly. Check your state government energy or environment agency website for current offerings.
Finance Options for Energy Upgrades
1. Green / Sustainability Loan
Some lenders offer dedicated green loan products at competitive rates for energy upgrades:
- Lower interest rates than standard personal loans (some lenders offer 5.5–8%)
- Typically unsecured
- Used specifically for solar, battery, or other eligible energy-efficient upgrades
Eligibility: Varies by lender. Often requires proof of eligible product installation by an approved installer.
2. Home Loan Top-Up (Equity Release)
If you have equity in your home, rolling energy upgrade costs into your mortgage gives the lowest interest rate.
- Rate: ~5.75–6.25% variable
- Long-term — but extra repayments can clear it quickly
Example: $15,000 solar + battery system funded via home equity at 6.00%. If you make extra repayments of $300/month beyond the minimum increase:
- Repaid in approximately 4 years
- Total interest: ~$1,800 — very low
3. Personal Loan
For those without equity, or who prefer not to change mortgage terms.
- Rate: 8–12% (compare rates carefully)
- Term: 3–7 years
- Unsecured — no property risk
$15,000 at 9% over 5 years: Monthly repayment ~$311; total interest ~$3,660
4. Solar Installer Finance / Buy Now Pay Later
Some solar companies offer in-house finance, including interest-free periods. Read the terms carefully:
- Interest-free may revert to a high rate if not fully repaid in the promotional period
- Origination fees may apply
- Always compare the comparison rate (not just the headline rate)
5. Government Concessional / Interest-Free Loans
Some state programs offer interest-free or low-interest loans for eligible households (often means-tested or targeted at renters and low-income owners). These are the most cost-effective option where available.
Does Solar Actually Save Money?
The financial case for solar depends on:
- System size and roof orientation
- Local electricity tariffs and feed-in tariffs
- Household usage patterns (daytime vs night)
- Whether battery storage is included
General indicative savings for 6.6kW system (no battery):
- Annual electricity savings: $1,200–$2,000/year (varies significantly)
- Payback period: 4–8 years (depending on usage and tariffs)
- System lifespan: 20–25 years
Adding a battery shortens the self-consumption window but extends payback period — typically battery-only payback is 10–15 years currently.
Past savings performance is not indicative of future savings, which depend on electricity pricing, tariff changes, household usage, and system performance over time.
Frequently Asked Questions
Can I finance solar if I am renting or in a strata property?
If you rent, you generally cannot finance structural improvements (solar panels) to a property you do not own. Body corporate rules apply in strata — some strata buildings are enabling rooftop solar for common areas or individual lots; check with your strata manager.
Does solar add value to my home?
Research suggests solar panels can add modest value to Australian homes — typically 1–3% of property value. However, evidence is mixed and market-dependent. Buyers often view solar as a feature rather than a core value driver.
Is the interest on a solar loan tax-deductible?
For owner-occupied homes: generally no. For investment properties: if the solar system is installed on a rental property and reduces expenses or generates income, the interest may be deductible. Confirm with a registered tax agent.
Related Renovation Guides
- Home Renovation Loans Australia — Your Finance Options
- Personal Loan vs Home Equity for Renovation
- How to Budget for a Home Renovation
- Renovation Finance Hub
This article provides general information about energy upgrade finance in Australia. Government programs and incentives change frequently — verify current offerings with your state government. Speak with a licensed financial adviser or mortgage broker for personalised guidance. Find one through MoneySmart.